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Finding the Fourth Proportional to 394,911, 545,064.84 and 272,575.08

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Solution

The fourth proportional to 394,911, 545,064.84 and 272,575.08 is: 376,214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,911 : 545,064.84 = 272,575.08 : x
  2. Step 2: Convert to fraction form
    394,911/545,064.84 = 272,575.08/x
  3. Step 3: Cross multiply
    394,911x = 545,064.84 × 272,575.08
  4. Step 4: Simplify right side
    394,911x = 148,571,092,368.19
  5. Step 5: Solve for x
    x = 148,571,092,368.19/394,911
  6. Step 6: Final answer
    x = 376,214.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.